Page 150 - Motor protection and control Manual motor starters, contactors and overload relays

3/76 ABB MOTOR PROTECTION AND CONTROL

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3-pole contactors
Electrical durability

Electrical durability for AC-3 utilization category - Ue ≤ 440 V.
03
Switching cage motors: starting and switching off running motors. The breaking current Ic for AC-3 is equal to the rated
operational current Ie (Ie = motor full load current).
Ambient temperature and maximum electrical switching frequency: see "Technical data".

Millions of AF1350, AF1650:
The electrical durability
operating AF30, AF38 AF80, AF96 AF140, AF146 at the rated current is
AF750
cycles AF09 AF12 AF16 AF26 AF40 AF52 AF65 AF116 AF190 AF205 AF265 AF305 AF370 AF400 AF460 AF580* * 50000 operating cycles.
10

5

3 9
7
5
3
2 9 1
1.8 7
5
3
1
1

0.5

13 57 9 13 57 9 15 9 13 57 9
0.3
13 57 9
1 3 5 7 9 15 9 1 3 5 7 9
0.2
2 3 5 10 20 30 50 100 200 300 500 1000
55
Breaking current Ic (A)
Note: * For AF580 and AF750 contacts needs to be replaced after 750k operations.
Example:
Motor power 30 kW for AC-3 - Ue = 400 V and Ie = 55 A utilization – Electrical durability required = 1.8 million operating cycles.
For AC-3: Ic = Ie. Select the AF65 contactor at intersection " " (55 A / 1.8 million operating cycles) on the curves
(AC-3 - Ue ≤ 440 V).

1SBC101941S0201